dotfiles/mcp-config

mcp-config — shared client config for laptops

Single source of truth for what the agents see: the covert-gpt model provider (LiteLLM at llm.covert-gpt.com) and the MCP servers, which run client-side. Users install once; their config then refreshes automatically on each new shell.

Two clients consume it: opencode (deployed to ~/.config/opencode/opencode.gateway.json) and Hermes (its mcp_servers: block in ~/.hermes/config.yaml is rendered from the same definitions — see "One definition, two clients" below).

MCP runs on the CLIENT, never on the gateway

The LiteLLM gateway hosts no MCP servers — deliberately. Every API worth exposing (Gitea, Proxmox, UniFi, NetBird, k8s) is user-scoped, so hosting it centrally means one shared token per server: every user acts as the same identity and attribution is gone.

LiteLLM can do per-request BYOK (env values written ${X-Header} are filled from the caller's headers — verified working for proxmox on v1.87.0), but only for servers that tolerate a credential-less spawn. LiteLLM builds its tool→server mapping from a headerless background listing, and gitea-mcp hard-exits without a token, so it never registers and its tool calls 404. The gateway could therefore host only some servers — and a split brain (some MCPs server-side, some client-side) is worse than either. So all MCP servers are defined here, each reading the user's own credentials from their own environment. The config is identical for everyone; only the secrets differ.

One definition, two clients

The servers are defined once, in opencode.gateway.json's mcp block. Hermes speaks a different schema, so sync.sh renders that one definition into mcp_servers: in ~/.hermes/config.yaml rather than keeping a second copy — two copies would drift, one pinned to gitea-mcp@0.0.10 and the other to whatever got typed. Add a server here once and both clients get it, within the same TTL. The translation is mechanical:

opencode	Hermes
command: ["npx","-y","pkg@1.2.3"] (argv list)	command: npx + args: ["-y","pkg@1.2.3"] — Hermes' command must be a string; a list stringifies and fails at exec
environment: {K: "{env:VAR}"}	env: {K: "${VAR}"}
type: remote, url, headers	url, headers
enabled: false	entry omitted

Both placeholder forms are by-NAME references resolved at runtime, so no secret is written to either file. Hermes hands an MCP child only a filtered baseline environment, so every secret a server needs must be listed in env: — which is exactly what the rendered block does.

Servers you add to Hermes by hand are left alone: sync.sh records the names it rendered in ~/.config/mcp-sync/hermes-managed.json, so a server dropped from this repo is dropped from Hermes too, while anything not in that manifest is never touched. Rendering is skipped silently when Hermes isn't installed, and needs PyYAML (it warns if that's missing). Nothing needs adding to Hermes' platform_toolsets — MCP servers are auto-enabled by name; listing some would turn it into an allowlist, and no_mcp disables them all.

Credentials are referenced as {env:VAR} and are never written into the config. Each user exports them in ~/.zshrc.local:

MCP server	env vars
gitea	GITEA_KEY
proxmox	PROXMOX_MCP_TOKEN_ID, PROXMOX_MCP_TOKEN_SECRET

Requires npx — the MCP servers are npm packages that opencode spawns as npx -y <pkg>@<version>. bootstrap.sh installs Node for this (node/). Without it every server dies with "command not found", which opencode surfaces only as a dead server — easy to misread as a broken config.

This repo lives in Gitea at public/dotfiles. (It is mirrored from the ai-k8s-iac repo under mcp-config/; edit it there or here and keep them in sync — the laptops pull from Gitea's main.)

How it works

• opencode.gateway.json — the shared base config:

  • the covert-gpt model provider (LiteLLM's OpenAI-compatible endpoint at https://llm.covert-gpt.com/v1, models map left empty — it is filled by discovery at sync time), and
  • the MCP servers, each type: local, spawned by opencode as npx -y <pkg>@<pinned-version> on the user's own machine.

  Identical for every user: every credential (the LiteLLM key, the Gitea PAT, the Proxmox token) is injected via {env:VAR} and never written into the file. Versions are pinned — npx runs whatever the registry serves, and that process gets your tokens.

• sync.sh — sourced from each user's shell rc. On a new shell (throttled ~1h) it pulls the base config from Gitea, queries the gateway's /v1/models with the user's key to auto-discover models (opencode can't list models from a custom provider itself, so the map is materialized client-side; if discovery fails the previous map is carried over), deploys the repo's skills (see below), deploys the config to ~/.config/opencode/opencode.gateway.json, and exports LITELLM_KEY (from ~/.config/mcp-sync/key) plus OPENCODE_CONFIG (pointing at the deployed file — opencode does NOT auto-load extra files in its config dir, so without this export the file is ignored). Silent + non-fatal: a Gitea hiccup never breaks the shell, last-good config stays in place.

• ../skills/ — the shared skill folders, deployed to ~/.config/mcp-sync/skills and wired in through skills.paths in the config above. Skills are plain files, so — unlike models and MCP servers — there is nothing on the gateway to discover and the repo is the source of truth; the tree is fetched whole from the repo tarball. They deploy to mcp-sync's own directory rather than ~/.config/opencode/skills so the atomic replace can never delete a skill the user wrote by hand. See skills/README.md.

• install.sh — one-time bootstrap (curl-pipe). Fetches sync.sh, stores the user's key (0600), and adds the rc hook.

opencode merges the OPENCODE_CONFIG file on top of the user's global ~/.config/opencode/opencode.json (and under any project opencode.json), so the synced config coexists with each user's own settings and any local-only MCP servers (e.g. a client-side kubernetes pointed at their own kubeconfig). Sync never touches those.

User setup (one time)

Each user needs a LiteLLM virtual key (for models) plus their own credentials for each MCP server. Run bootstrap.sh (it installs Node, which provides the npx the MCP servers need), then:

curl -fsSL https://git.nic-oconnor.com/public/dotfiles/raw/branch/main/mcp-config/install.sh | sh
# (prompts for the sk-... key; or pass it: ... | LITELLM_KEY=sk-... sh)

Then export your own MCP credentials in ~/.zshrc.local:

export GITEA_KEY=...                  # your Gitea PAT (repo + issue scopes)
export PROXMOX_MCP_TOKEN_ID=...       # e.g. alice@pve!mcp
export PROXMOX_MCP_TOKEN_SECRET=...   # the token UUID

Open a new terminal, run opencode, and the tools are there — acting as you.

Adding an MCP server (admin)

Add it to mcp.<name> in opencode.gateway.json as type: local, with a pinned package version and {env:VAR} refs for every secret, then push to main. Users pick it up within the sync TTL (or immediately on a new shell).

Two hard requirements:

• It must be an npm package (opencode spawns it with npx).
• Its credentials must be per-user, via {env:VAR}. Never commit a token, and never introduce a shared one — that is the whole reason MCP is not on the gateway.

Models are different: they live on the gateway (charts/inference/values.yaml → model_list) and are auto-discovered by the /v1/models query in sync.sh. No client change needed.

Adding a skill (admin)

Add a folder under skills/ and push to main — see skills/README.md. Verify with opencode debug skill.

"I added a model on the gateway and opencode doesn't see it"

Almost always a stale local config, not a gateway or key problem. The sync runs only at shell start and is throttled to MCP_SYNC_TTL (1h), so a new model can take up to an hour and a new terminal to appear.

Pull it immediately:

mcp-sync          # force a refresh now, ignoring the TTL; prints the model list

If the model still isn't listed, it isn't reaching your key — check the gateway, not the client:

curl -fsS -H "Authorization: Bearer $LITELLM_KEY" \
  https://llm.covert-gpt.com/v1/models | jq -r '.data[].id'

Whatever that prints is exactly what sync.sh will deploy. A model present here but missing in opencode is a sync problem; a model missing here is a LiteLLM model_list or key-scoping problem.

Notes / caveats

• Local-server precedence: opencode merges with later-config-wins on key conflicts. If a user names a local server the same as a gateway one, theirs wins. Use distinct names.
• Key rotation: re-run install.sh (or edit ~/.config/mcp-sync/key).
• Other clients: Hermes is wired (see "One definition, two clients"). Claude Code / open-webui would each still need a parallel render step in sync.sh; not done yet.
• Throttle: mcp-sync forces one refresh; MCP_SYNC_TTL=0 in the environment makes every new shell pull.
• python3 is required for model discovery. Without it sync.sh deploys the base config verbatim, so the provider comes up with an EMPTY model list. It warns when this happens; bootstrap.sh installs python3.